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H. R. FARNSWORTH.

FELTLESS WET MACHINE FOR PAPER MAKING.

APPLICATION FILED NOV.'13, 1919.

1 ,407,398 Patented Feb. 21, 1922.

3 SHEETS-SHEET 1.

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BY 7% M- ATTORNEY.

H. R. FARNSWORTPL,

FELTLESS WET MACHINE FOR PAPER MAKING.

APPLICATION nuzn nov .,1s, 1919. 1 ,398, Patented Feb. 21, 1922..

3 SHEETSSHEET 2.

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H. R. FARNSWORTH.

FELTLESS WE'T MACHINE FOR PAPER MAKING.

APPLICATION FILED NOV. 13, I919. 1,407,398. Patented Feb. 21, 1922.

3 SHEETS-SHEET 3.

INVENTOR,

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lEP I Hiland 1E. ihflww ATTORNEY.

UNITED STATES PATENT OFFICE.

HILAQN'D R. FARNSWORTH, OF SANDUSKY, OHIO. ASSIGNOR TO THE SANDUSKY FOUNDRY & MACHINE (30., OF SANDUSKY, OHIO, A CORPORATION OF OHIO.

FELTLESS WET MACHINE FOR PAPER MAKING.

Specification of Letters Patent.

Patented Feb. 21, 1922.

To all whom it may concern:

Be it known that I, HILAND R. FARNs- WORTH, a citizen of the United States of America, residing at Sandusky, county of Erie, State of Ohio, have invented certain new and useful Improvements in Feltless lVet Machines for Paper Making, of which the following is a specification.

This invention relates to improvements in paper making machinery. An object of the invention is to provide a device for rapidly and efficiently abstracting the water from the wet pulp. It has been the common practice heretofore to use a rotating cylinder which has a perforated face covered with a wire gauze of fine mesh. This cylinder is emerged in a vat of pulp which contains about 99% water. The water flows by gravity through the wire mesh into the cylinder, leaving a deposit of pulp sticking to the outer surface of this wire gauze. This pulp is then picked off by an endless felt.

The present invention is designed to do away with felts and to increase the force of gravity by employing a suitable pressure of air for forcing the water from the pulp. The invention in general comprises a rotating member or drum formed with a suitable number of flat sides or perforated faces, eight of which are shown in the drawings. These perforated sides are covered with a layer of fine wire mesh similar to Fourdrinier wire which is placed on the rotating drum. Means is provided for intermittently rotating the drum. During the periods of rest of the drum the pulp is flowed or fed to one of the flat sides or surfaces of the rotatable drum. A suitable cover is provided for engaging the face and for confining a definite quantity of the pulp on the face. After the quantity of pulp is delivered to the drum, a suitable valve shuts olf the supply of pulp, and air, under pressure, is forced under the cover with the re suit that the water contained in. the pulp is forcibly driven from the pulp and through the wire mesh. The drum is then rotated another step and a new supply of pulp is fed onto the wire on the drum. For the purpose of removing the dry pulp from the flat faces or surfaces of the drum after it has been stepped forward through a suitable arc, air under pressure is delivered to the reverse side of the wire which blows the comparatively dry sheet of pulp from the drum. Practically all of the water has now been abstracted from the pulp. This layer, or sheet, of dry pulp falls onto a suitable eonveyer.

Referring to the drawings:

Fig. 1 is a side elevational view of the as s embled machine showing the mechanism ior rotating the drum in a step by step or intermittent manner, the means for feeding the supply of pulp to the drum and the "means for automatically placing the cover which incloses the charge of pulp, also the air and water supply pipes.

Fig. 2 is a side elevational View of the mechanism which automatically opens and closes the valve that controls the supply of paper pulp and air. I

Fig. 3 is a side elevational view showing a modification for operating the drum and for operating the cover.

Fig. 4 is a front elevational view of the drum showing the perforated plate, the wire thereon; and V Fig. 5 is a-detail view of a part of the drum showing the perforated plate in section, the fine wire thereon, a charge of pulp on the wire, and the pipe connections.

ieferring to the drawings in detail: The base part of the machine is indicated at 1. Located on the base are the shaft bearing supports 2 and 4 indicates the shaft which carries the fast and loose pulleys 5 and 6. Located on the shaft 4%. is a pinion 7, which meshes with the large gear 8. This gear drives the shaft 9 that carries the worm .30 which, in turn, meshes with and drives the large worm gear 11. Connected to the worm gear 11 at the point 12 is a link 13. The outer end of this link is connected to a lever arm 14: at the point 15. This lever vibrates about the shaft 16 which supports the drum. Attached to its upper end is a pawl 1.7. This pawl engages the ratchet wheel 18. The ratchet wheel is secured to the shaft 1.6 on which is mounted the pulp receiving drum or rotor 19. The numeral Ll) designates the faces of the drum which are perforated plates, see Figs. 4 and 5. 21 designates the wire mesh similar to Fourdrinier wire. Located on the outer ends of the rotor are rollers Secured to the base 1 is a casting or block 23 and projecting upward from this block are the guide rods 24:. The upper ends of these rods are secured together by means of the plate or yoke 25.

Slidably mounted on the rods 24 is the hood or cover member 26. this cover is formed with a water tight packin 27(1Pivotally attached to the upper sie of the cover 183 link 28. This link is pivotally connected to the link 29 by means of the link 30 and pin 31. The upper end of the link 29 is pivotally connected to the yoke member at 32. The link 30 is attached to the lever 33, at 34. The lever 33 is pivotally'connected to the yoke 25 at the point 35; Its upper end 36 is attached to a compression spring 37 the opposite end of which bears against a fixed bracket 38; This spring forces the bent lower end portion of the lever'33 inward and directly into the path of the rollers 22, whereby when the drum 19 is moved forward, one step at a time, the rollers 22 will strike the lever 33 and lift the cover 26. This lifting operation occurs since the rollers 22 by engaging the'lever 33 willmove the same outward, as shown by the arrow 39, therefore breaking the toggle joint levers 28 and 29.

As the drum comes to rest at the end of its next stepthe cover 26 will be lowered into place by the toggle levers 28 and 29. A definite charge or quantity of paper pulp is now fed onto the wire 21 which, at that moment, is engaged by the cover 26. The valve 40 is now'automatically opened by means of the valve operating mechanism which comprises the following structures: 41 is a lever that operates the valve 40 and is connected to the adjustable link 42 in which is located a turn buckle 43'. The link 42 is connected to the lever 43 which is pivotally secured to the standard 44 at the plate 47. As the drum 19 revolves it carries the roller 46 around with it and retains the lever 43' so that the valve 40 is held open for a period of practically one half of a revolution of the gear 11. This is held open by means of the lever 47 engaging the surface 48. The charge of pulp is forced through the pipe 49 onto the wire screen 21 which is located under the water tight cover 26, it being understood that the drum 19 is now at rest and the cover 26 is closed or down on the perforated plate 20 as shown in Fig. 5,'although the wheel 11 is rotating. After the'charge of'pulp is shut off, the supply of air under pressure is admitted to the under side of the cover 26 by means of I evenly distribute the pulp on the wire so as to produce an even layer of dry pulp.

I may dispense with the pipe 50 for forcing compressed air into the cover 26 by using the pipe 49 after the valve 40 is closed. I

The lower edge of accomplish this purpose by placing a valve 40 in the pipe 49. This valve is connected to an arm 40 which is connected to a link 40 that is also connected to the operating lever 43; the arrangement being such that the valve 40 is opened after the valve 40 is closed and vice versa. 46 are used to close the valves.

The next step in the operation of the ap paratus is the operation of moving the drum forward by means of the ratchet mechanism, when the operations just described are repeated.

In order to remove the sheet of comparatively dry pulp from the wire 21, which is indicated at 52, at the right of Fig. 1, a blast of air, under pressure, is directed against the under side of the layer of dry pulp 52 as shown at the right of Fig. 1, causing the sheet of pulp to fall, as indicated by the arrow 54 onto the endless conveyor 55 which conducts the dry pulp to any suitable place. Air is led into the drum by means of the pipe 19. fFor washing and cleaning the plate 20 and screen 21 water is directed against the inside surface of the plate as shown by means of the pipe 19 Weights 40* and Referring to the construction shown in f Fig. 3, in which a modified form is used for operating the drum and for also raising and lowering the cover plate 26, the wheel 11 is formed with a cam groove 11 in which travels a roller 11 that is mounted on the bar 11 which is connected to the lever 11 by means of the turnbuckle 11. The lever 11 is attached to the cover plate 26 by means of the link 11. Also connected to the gear 11 is the link 13 as before. This arrangement causes the cover to rise during the movement of the drum, and to remain stationary when the drum is stationary. The pipe 49 may be used to admit any desired coloring material to the charge of pulp 20 shown in Fig. 5.

l/Vhat I claim is:

1. In a machine of the kind described, the

combination, of an intermittently rotatable member, means for rotating the same, said member having plates or the like secured thereto formed with perforations, screens on said plates, a cover for engaging'the plates, means for raising and lowering the cover during the rotation of said member, means for supplying pulp to the interior of the cover, when the member is stationary, means for shutting off the supply of pulp and means for forcing air, under pressure, into the cover for expelling water fromthe pulp through the screen and perforated plate.

2. In a machine for extracting water from paper pulp, the combination, of an inter I mittently rotatable member, means for rotating said member in a step by step manne'r, said member having a plurality of perforated members, a cover adapted to engage said members and form a water tight joint, means for forcing the pulp under pressure into the cover and onto the plates (hiring the period that the member is stationary, means for forcing air, under pressure, into the rover for driving Water out of the pulp, means for lifting the cover and means for detaching the comparatively dry pulp from the perforated members by mean: of air pressure by striking the reverse side of the pulp, as described.

3. A machine for extracting water from wet pulp, comprising in combination, of an intermittently rota-ting drum-like member, means for operating the same step by step, sa d member having a plurality of perforated surfaces leading to the interior of the member, a screen enga ing said surfaces and a cover plate adapted to engage the surfaces in succession and when the member is at rest, means for forcing the Wet pulp into the interior of the cover and onto the screen, means for shutting off the supply of pulp, n'ieaus for forcing air into the cover to expel the water from the pulp and force it through the screen, and means for detaching the comparatively dry pulp from the drum after the air pressure is shut off.

a. In a machine for extracting the surplus Water from paper pulp, an intermittently rotatable drum-like member having a plurality of members for receiving the pulp, said members being perforated, a cover for engaging the surfaces when the member is in a stationary position and means for disengaging the cover from the member during the rotary motion of the member, means for operating or lifting the cover simultaneously with the operation of the rotatable member, said means comprising; a gear or the like, a connecting link between the gear and drum, and means operable from said. gear for operating the cover during the operation of the drum and for causing the cover to remain stationary when the drum stationary,

5. in a machine for extracting water from paper pulp, comprising, in. combination, an intermittently rotatable drum-lil e member having a plurality of pulp receiving surfaces, said surfaces beino; perforated, a cover for successively engaging the surfaces during the period that the drum is stationary, means for forcing pulp under the cover and onto the surfaces, means for forcing air, un dor pressure, into the cover for evenly spreading or distributing the pulp on the surfaces and for expelling the water, means for disengaging the pulp from the surfaces member hav perforated portions to receive the pulp, a cover adapted to engage said portions and confine a quantity of the pulp between the cover and the surfaces, means for forcing air into the cover to expel the water from the pulp, means for di engaging the cover from said portions and means for forcing air into the movable member to engage the reverse side of the sheet of pulp for the purpose of detaching the same from the perforated portions of the movable member.

7. A machine for extracting; Water from paper pulp, coniprisil'ig, in combination, a rotatable member liming,- perforated pulpreceiving surfaces, a cover device engaging said surfaces to confine a quantity of pulp on said surfaces, means to introduce the pulp into the confining; space under the cover, and means for introducing air under pres sure into the space to evenly distribute the pulp and for forcing the Water from the pulp through the perforated surface,

8. A machine for extracting water from pulp, comprising, in combination, a member having perforated piilpueceiving sur faces, a device for engaging said surfaces to confine a quantity of pulp on said surfaces, means to introduce the pulp into the con fining space under the cover, means for introducing air under pressure into the space to evenly distribute the pulp and for forcing the Water from the pulp through the per forated surface, and means to disengage the layer dry pulp from said surface by directing a current of air or other fluid against the reverse side of the perforated member.

9. In a machine for drying pulp, the coml'iination of a rotatable perforated member, sieves thereon, a cover successively engaging the sieve members, cans for conveying the pulp to the inside of the cover, means for conveying under pressure to the inside of the cover for driving the Water from the pulp and through the perforated member, means for introducing coloring material to the pulp while under the cover, and devices for removing the dry pulp from the perforated member, as described.

HILAND R. l ARNSWOR'llH. 

